feat(agent): add Swedish Desktop Agent localization

[Daniel Nylander (yeager)]

Adds Swedish text for the visible Desktop Agent profile, service-status, privilege-elevation and error messages.

This gives Swedish-speaking administrators a localized agent interface while retaining the existing resource keys and behavior.

Issue: #1983

[Daniel Nylander (yeager)]

Implementation notes:

• Adds Resources.sv.resx as a standard .NET satellite resource, following the existing French resource pattern.
• Contains the same 14 visible Desktop Agent keys as the neutral resource; no source strings, generated code, or runtime behavior change.
• XML syntax was validated with the available parser, key parity found 14/14 keys with no extras or empty values, and git diff --check passes.
• The local environment does not include the .NET SDK, so resource compilation is intentionally left to the repository CI.
• No breaking changes or migration steps.

[Daniel Nylander (yeager)]

Installer localization update:

• Adds a Swedish sv-se WiX localization resource for the Agent installer and registers it as an embedded installer resource.
• The resource has 72/72 current English installer keys, including Agent Tunnel DNS/CIDR enrollment, PowerShell Universal endpoint/token configuration, UAC, installation, repair and removal flows.
• XML parsing, exact key parity, MSI variable/format-token parity, and git diff --check pass locally.
• The .NET/Wix build remains delegated to repository CI because the local environment has no .NET SDK.